Bulb for temperature-indicating instruments.



BULB FOR TEMPERATURE JNDIGA'TING W NT APPLICATION man 00?, 1.1 1

1,%66,580. Patented May 21, 1918.

ATENT @FFKEE.

PHILO M. GELATT, OF LA CROSSE. WISCONSIN Application filed October 1, 1917.

To all whom it may concern:

Be it known that I, PHILo M.-GELATT, a citizen of the United States of America, re siding at La Crosse in the county of La Crosse and State of Wisconsin, have inventedcertain new and useful Improvements in Bulbs for Temperature-Indicating Instruments, of which the following is a specification, reference being bad therein to the accompanying drawings.

In the use of temperature indicators, especially for high speed motors, wherein a bulb which is connected to the indicating mechanism by a slender conduit is inserted through the wall of the motor into the lubricant or cooling liquid thereof, the vibrations of the motor frequently cause the connection between the bulb and the conduit to crystallize and snap oif or leak.

This invention relates to a bulb for in struments of the character noted together with means for connecting and supporting the same in operative position, arranged and fitted to prevent vibration and avoid subsequent deterioration of the connection.

The invention. consists in the matters hereinafter set forth and more particularly ointecl out in the appended claims.

In the drawings,

Figure 1 is a view partially in elevation and partially in section, of a device embodying features of the invention;

Fig. 2 is a view in end elevation thereof;

Fig. 3 is a view, partially in side elevation and partiallyin section, of a modification of the device, and

Fig; 4: is a view in end elevation ofthe modification.

As herein shown in' preferred form, a tubular bulb 1 of suitable material with a flange 2 at one end thereof has an enlarged spindle 3 extending therefrom to the end of which a slight conduit tube 4 is secured.

An exteriorly screwthreaded bushing 5 has an inner flange 6 against which the flange of the bulb is secured by a jam nut 7 which encircles and. steadies the nipple 3, the bushing itself being properly secured in the wall 8 through which the bulb is to be inserted, there being an outer flange 9 for seating the bushing when screwed home.

Specification of Letters Patent.

Patented May at. rate.

Serial No. 194,151.

The nipple 3 is of sufiicient length. to protrude slightly beyond the nut 7 and thereby prevent any sidewise pressure of any sort being exerted'upon the tube 4.

Or if preferred, as shown in the modification Figs. 3 and 4, a bulb 10 with a flange 11 and screwthreaded ni rule or enlar ed stem 12 is inserted through an exteriorly screwthreaded bushing 13, the flange 11 being brought against the shoulder formed by the inner face thereof by jam nut 14 engaging the screwthreads of the nipple 12. The usual conduit or ipe 15 extends from the nipple.

As a result of this construction the bulb is bodily inserted through the wall of the motor or receptacle'in which it is to be secured, and is firmly held by the bushing and jam. nut and flange of the bulb in such a way that any vibration is minimized and its effect on the protruding cylinder conduit is rendered practically ml. The result is of course obtained by the broad lateral bearing afforded by the flange of the bulb, contacting as it does with the annular shoulder on the inner end portion of the bushing, against which it is firmly held by the action of the jam nut. The device is readily re moved for inspection and is round to be durable.

Obviously, changes in the details of construction may be made without departing from the spirit of my invention and I do not care to limit myself to any particular form or arrangement of parts.

What I claim is 1. A bulb fitting for ten'lperature and pressure indicating instruments comprising a bulb, a nipple extending from thennsealed end thereof, a, bearin flange on the latter end, a supporting bushing through which the nipple extends and against an end face of which the bearing flange contacts, and a jam nut in screwthreadcd engagement with the bushing adapted to force he flange to seat, the nipple protruding beyond the jam nut. 1

2. A bulb fitting for temperature and pressure indicating instruments comprising a bulb. having an annular flange at the un sealed end thereof, a nipple extending from the unsealed end thereof, a bushing adapted bulb against the bearing fade of the bushing.

to be inserted in all-opening of a support- In testimony whereof I affix my signature ing wall and provided'nem' one end with a, in the presence of two Witnesses. bearing face for receiving the nip 1e flange, 4 PHILO M. GELATT.

5 a slender tube extending from 16 nipple Witnesses:

and a jam nui; through which the nipple ANNA M; Donn, protrudes adapted to force the flange of the C. R. STICKNEY. 

